First the DNA analyst must determine whether a match exists in the case. Secondly, the DNA analyst must provide the jury with the statistical calculations to demonstrate how statistically significant the match is. The DNA analyst should tell the jury the statistics are calculated using well-accepted methods.
The random match probability (RMP) is the probability that a randomly selected person would have the same DNA profile as thought found in the evidence sample. It also expresses the frequency with which one would expect to find a particular DNA profile in the population. This statistic is obtained using the product rule. The DNA analyst need explain no more than the fact that the product rule is the standard method used by the scientific community.
Is this match a rare or common event? How often would we expect to see this match in the population?
Additional Online Courses
- What Every First Responding Officer Should Know About DNA Evidence
- Collecting DNA Evidence at Property Crime Scenes
- DNA – A Prosecutor’s Practice Notebook
- Crime Scene and DNA Basics
- Laboratory Safety Programs
- DNA Amplification
- Population Genetics and Statistics
- Non-STR DNA Markers: SNPs, Y-STRs, LCN and mtDNA
- Firearms Examiner Training
- Forensic DNA Education for Law Enforcement Decisionmakers
- What Every Investigator and Evidence Technician Should Know About DNA Evidence
- Principles of Forensic DNA for Officers of the Court
- Law 101: Legal Guide for the Forensic Expert
- Laboratory Orientation and Testing of Body Fluids and Tissues
- DNA Extraction and Quantitation
- STR Data Analysis and Interpretation
- Communication Skills, Report Writing, and Courtroom Testimony
- Español for Law Enforcement
- Amplified DNA Product Separation for Forensic Analysts